string/endian.h

   1 /* Copyright (C) 1992-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _ENDIAN_H
  19 #define _ENDIAN_H       1
  20
  21 #include <features.h>
  22
  23 /* Get the definitions of __*_ENDIAN, __BYTE_ORDER, and __FLOAT_WORD_ORDER.  */
  24 #include <bits/endian.h>
  25
  26 #ifdef __USE_MISC
  27 # define LITTLE_ENDIAN  __LITTLE_ENDIAN
  28 # define BIG_ENDIAN     __BIG_ENDIAN
  29 # define PDP_ENDIAN     __PDP_ENDIAN
  30 # define BYTE_ORDER     __BYTE_ORDER
  31 #endif
  32
  33 #if defined __USE_MISC && !defined __ASSEMBLER__
  34 /* Conversion interfaces.  */
  35 # include <bits/byteswap.h>
  36 # include <bits/uintn-identity.h>
  37
  38 # if __BYTE_ORDER == __LITTLE_ENDIAN
  39 #  define htobe16(x) __bswap_16 (x)
  40 #  define htole16(x) __uint16_identity (x)
  41 #  define be16toh(x) __bswap_16 (x)
  42 #  define le16toh(x) __uint16_identity (x)
  43
  44 #  define htobe32(x) __bswap_32 (x)
  45 #  define htole32(x) __uint32_identity (x)
  46 #  define be32toh(x) __bswap_32 (x)
  47 #  define le32toh(x) __uint32_identity (x)
  48
  49 #  define htobe64(x) __bswap_64 (x)
  50 #  define htole64(x) __uint64_identity (x)
  51 #  define be64toh(x) __bswap_64 (x)
  52 #  define le64toh(x) __uint64_identity (x)
  53
  54 # else
  55 #  define htobe16(x) __uint16_identity (x)
  56 #  define htole16(x) __bswap_16 (x)
  57 #  define be16toh(x) __uint16_identity (x)
  58 #  define le16toh(x) __bswap_16 (x)
  59
  60 #  define htobe32(x) __uint32_identity (x)
  61 #  define htole32(x) __bswap_32 (x)
  62 #  define be32toh(x) __uint32_identity (x)
  63 #  define le32toh(x) __bswap_32 (x)
  64
  65 #  define htobe64(x) __uint64_identity (x)
  66 #  define htole64(x) __bswap_64 (x)
  67 #  define be64toh(x) __uint64_identity (x)
  68 #  define le64toh(x) __bswap_64 (x)
  69 # endif
  70 #endif
  71
  72 #endif  /* endian.h */